package com.sky.service.admin.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.*;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import com.sky.utils.JwtUtil;
import com.sky.vo.EmployeeLoginVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;
    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 员工登录
     *
     * @return 结果
     */

    @Override
    public Result<EmployeeLoginVO> login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        if (StrUtil.isEmpty(username) || StrUtil.isEmpty(password)) {
            throw new ParameterIsNullException("用户名或密码为空");
        }

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //log.info("加密之后的密码是{}", password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //employee.getStatus可能是null，所以尽量把常量放在前面
        if (StatusConstant.DISABLE.equals(employee.getStatus())) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.EMP_ID, employee.getId());
        String token = JwtUtil.createJWT(
                jwtProperties.getAdminSecretKey(),
                jwtProperties.getAdminTtl(),
                claims);

        EmployeeLoginVO employeeLoginVO = EmployeeLoginVO.builder()
                .id(employee.getId())
                .userName(employee.getUsername())
                .name(employee.getName())
                .token(token)
                .build();

        return Result.success(employeeLoginVO);
    }

    @Override
    public Result<String> add(EmployeeDTO employeeDTO) {
        //1.校验参数
        //2.处理业务
        //Employee employee = new Employee();
        Employee username = employeeMapper.getByUsername(employeeDTO.getUsername());
        if (ObjectUtil.isNotEmpty(username)) {
            throw new ParameterIsNullException("用户名重复");
        }

        Employee employee = BeanUtil.toBean(employeeDTO, Employee.class);
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //employee.setStatus(1),基本不出现常量，使用常量的时候就要注意
        employee.setStatus(StatusConstant.ENABLE);
        // 已经在aop中完成了
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // Long empId = BaseContext.getCurrentId();
        // employee.setCreateUser(empId);
        // employee.setUpdateUser(empId);
        employeeMapper.add(employee);
        //3.封装数据
        return Result.success();
    }

    @Override
    public Result<PageResult> pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //if (employeePageQueryDTO.getPage() <= 0 || employeePageQueryDTO.getPageSize() <= 0 || StrUtil.isEmpty(employeePageQueryDTO.getName())}
        //name属性是可以为空的  getPage返回值是int 而不是integer，所以检验要注意
        if (employeePageQueryDTO.getPage() <= 0 || employeePageQueryDTO.getPageSize() <= 0) {
            throw new ParamsIllegalException("分页参数非法");
        }
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

        return Result.success(new PageResult(page.getTotal(), page.getResult()));

    }

    @Override
    public Result<String> startOrStop(Integer status, long id) {
        //1.校验参数
        if (ObjectUtil.isEmpty(status) || id == 0) {
            throw new ParameterIsNullException("员工状态与ID均不能为空");
        }
        //2.处理业务
        Employee employee = new Employee();
        employee = employee.builder().id(id).status(status).updateTime(LocalDateTime.now()).updateUser(BaseContext.getCurrentId()).build();
        employeeMapper.updateStatusById(employee);
        //3.封装数据
        return Result.success();
    }

    @Override
    public Result<Employee> findById(Integer id) {
        //1.校验参数
        if (id == 0) {
            throw new ParameterIsNullException("ID不能为空");
        }
        //2.处理业务
        Employee employee = employeeMapper.findById(id);
        if (ObjectUtil.isEmpty(employee)) {
            throw new EmployeeNotExistException("员工不存在");
        } else {
            employee.setPassword("*************");
        }
        //3.封装数据
        return Result.success(employee);
    }

    @Override
    public Result<String> update(Employee employee) {
        //1.校验参数
        if (ObjectUtil.isEmpty(employee)) {
            throw new ParameterIsNullException("员工数据为空");
        }
        //2.处理业务
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
        //3.封装数据
        return Result.success();
    }
}
